中文说明： pwm整流器的建模仿真，用于信号特征提取、信号消噪，sar图像去噪的几种新的方法，分数阶傅里叶变换计算方面,对信号进行频谱分析及滤波，STM32制作的MP3的全部资料。
English Description：
The modeling and Simulation of PWM rectifier for signal feature extraction, signal denoising, the SAR image to some methods of noise, fractional Fourier transform calculation, the signal of frequency spectrum analysis and filtering, STM32 produced MP3.